hyolithid

hyolithid

[hahy-ol-i-thid]
noun
1.
any invertebrate of the extinct genus Hyolithes, most common in the Cambrian Period, having a limy, univalve shell, and thought to be related to the pteropods.
adjective
2.
belonging or pertaining to Hyolithes.

Origin:
< Neo-Latin Hyolith(es) (see hyoid, -lith) + -id2

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